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Home >> Porsche >> 2023 >> Cayenne Base, 4D Utility Coupe >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (47 Brakes - Brake Hydraulic System, Regulator, Booster 2.9L -- 9YA - Cayenne (9YA)) >> WM, 471519 Removing And Installing Brake Master Cylinder >> Removing Brake Master Cylinder

Removing Brake Master Cylinder

WARNING: This page is about a different variant/trim than selected.
WARNING: Danger of injury and damage from brake fluid! 
  • Poisonous if swallowed! 
  • Irritation and damage to skin 
  • Avoid contact with paint surfaces 
    1. → Store brake fluid in suitable, labelled containers only Wear protective gloves and goggles
    2. → In the event of contact (eyes or skin), wash immediately with water
    3. → In the event of contact with paint surfaces, wash off immediately with water - do not wipe off

Information 

When carrying out work during which fluids can escape, electric plug connections to be disconnected must remain locked and connected for as long as possible. This prevents fluid from getting onto electric contacts and causing corrosion.

Information 

Brake fluid - even thinned brake fluid - causes corrosion on electric contacts, thereby impairing functions.

  1. Have suitable aids ready for soaking up escaping fluids.
  2. Have suitable stoppers ready for closing off the line connections.
  3. Disconnect electric plug connection -2-  .
    G15292503Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Electric plug connections

    1. 3.1  Release and disconnect electric plug connection on the brake master cylinder -2-  .
    2. 3.2  Protect electric plug connection -2-  from brake fluid and soiling using suitable aids.
  4. Disconnect brake lines -1 and 2-  on the brake master cylinder.
    G15292504Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Brake lines on brake master cylinder

    1. 4.1  Place suitable aids underneath the brake master cylinder to soak up escaping fluids.

      Information 

      Any escaping brake fluid must be removed immediately. If necessary, rinse contacts with water and dry them.

    2. 4.2  Unscrew union nuts on brake lines -3 and 4-  and pull brake lines out of the brake master cylinder.
    3. 4.3  Close off line connections using stoppers and move brake lines -1 and 2-  aside carefully.
    4. 4.4  Close off connections with stoppers.
  5. Remove brake master cylinder -1-  .
    G15292505Courtesy of PORSCHE CARS NORTH AMERICA, INC.

    Removing brake master cylinder

    1. 5.1  Unscrew nuts securing brake master cylinder to brake booster -2-  .
    2. 5.2  Remove brake master cylinder -1-  by pulling it forward out of the brake booster -3-  .
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